/**
 * Copyright 2011-2011 - Members of the Chaupal Community
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package net.chaupal.Impl.Callback;

import net.chaupal.Impl.Callback.CallbackEvent;
import net.chaupal.Impl.Callback.CallableCallback;
import java.util.concurrent.Callable;

/**
 * Dummy implementation for test purposes.
 * 
 * @param <T> any callable return type
 */
public class DummyCallable<T> implements CallableCallback<T>, Callable<T> {
    
    private final long delay;
    private final boolean throwExecException;
    
    private boolean proceededCalled = false;
    private CallbackEvent<T> cbe = null;

    public DummyCallable(long millisDelay, boolean throwExecException) {
        
        this.delay = millisDelay;
        this.throwExecException = throwExecException;
        
    }
    
    @Override
    public void proceeded(CallbackEvent<T> event) {
        
        this.proceededCalled = true;
        this.cbe = event;
        
    }
    
    public CallbackEvent<T> getCallbackEvent() {
        return this.cbe;
    }
    
    public boolean isProceededCalled() {
        return this.proceededCalled;
    }

    @Override
    @SuppressWarnings("SleepWhileInLoop")
    public T call() {
        
        if ( this.throwExecException ) {
            throw new RuntimeException("As requested");
        }
        
        long target = System.currentTimeMillis() + this.delay;
        
        while ( System.currentTimeMillis() < target ) {
        
            try {
                long difference = target - System.currentTimeMillis();
                Thread.sleep(difference);
            } catch (InterruptedException ex) { }
            
        }
        
        return null;
        
    }
    
}
